EP 2379495 B1 20170301 - IMPROVING CUMENE OXIDATION
Title (en)
IMPROVING CUMENE OXIDATION
Title (de)
VERBESSERUNG DER CUMOLOXIDATION
Title (fr)
AMÉLIORATION DE L'OXYDATION DU CUMÈNE
Publication
Application
Priority
- EP 2009009122 W 20091217
- EP 08171942 A 20081217
- EP 09795716 A 20091217
Abstract (en)
[origin: WO2010069586A1] A process for oxidizing cumene to cumene hydroperoxide using an oxygen containing gas, which process composes - conducting a cumene feed and an oxygen containing gas feed to at least the first oxidation reactor in a series of 3-8 reactors, thereby forming an oxidation mixture, and - conducting the oxidation mixture from one oxidation reactor to at least one subsequent reactor, wherein - the reactors are operated with reducing liquid levels; - the oxidation is operated as a dry oxidation, whereby the only gaseous feeds conducted to the oxidation reactors are the cumene feed and the oxygen containing gas feed; - the oxygen containing gas feed is washed with caustic and then with water to remove all acidic or caustic traces before conducting it into an oxidation reactor; - the pressure within each oxidation reactor is in the range of 0-10 barg; - the off-gases from the top section of each oxidation reactor are separated and cooled, whereby a condensate containing unreacted cumene is formed, and - washing the condensate and recycling at least a part of it to at least the first oxidation reactor; - the non-condensed off-gases are treated in a thermal oxidizer; and - the first reactor in the series of oxidation reactors has a liquid inventory of 30- 300% larger than in the remaining reactors, preferably 50-100%, or the first two reactors in the series of oxidation reactors have a liquid inventory of 30- 300% larger than in the remaining reactors, preferably 50-100%.
IPC 8 full level
C07C 409/10 (2006.01); C07C 407/00 (2006.01)
CPC (source: EP US)
C07C 407/00 (2013.01 - EP US); C07C 407/003 (2013.01 - EP US); C07C 409/10 (2013.01 - EP US)
Citation (examination)
JP 2000290249 A 20001017 - MITSUI CHEMICALS INC & DATABASE WPI Week 200112, Derwent World Patents Index; AN 2001-106273
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2010069586 A1 20100624; CN 102256940 A 20111123; CN 102256940 B 20151021; EP 2379495 A1 20111026; EP 2379495 B1 20170301; ES 2621142 T3 20170703; US 2011301384 A1 20111208; US 8975444 B2 20150310
DOCDB simple family (application)
EP 2009009122 W 20091217; CN 200980150704 A 20091217; EP 09795716 A 20091217; ES 09795716 T 20091217; US 200913140042 A 20091217